431400333421 has 4 divisors (see below), whose sum is σ = 431404701052. Its totient is φ = 431395965792.

The previous prime is 431400333361. The next prime is 431400333437. The reversal of 431400333421 is 124333004134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11935562500 + 419464770921 = 109250^2 + 647661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431400333421 is a prime.

It is a super-2 number, since 2×431400333421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431400333421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431400333461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032146 + ... + 2234371.

It is an arithmetic number, because the mean of its divisors is an integer number (107851175263).

Almost surely, 2^431400333421 is an apocalyptic number.

It is an amenable number.

431400333421 is a deficient number, since it is larger than the sum of its proper divisors (4367631).

431400333421 is a wasteful number, since it uses less digits than its factorization.

431400333421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4367630.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 431400333421 its reverse (124333004134), we get a palindrome (555733337555).

The spelling of 431400333421 in words is "four hundred thirty-one billion, four hundred million, three hundred thirty-three thousand, four hundred twenty-one".